Regal Concealed Urinal Flushometers Quiet, Concealed, Diaphragm Type, Rough Brass Urinal Flushometer for either left or right hand supply with the following features:ADA Compliant Metal Oscillating Non-Hold-Open Handle Adjustable Tailpiece Vacuum Breaker Elbow Flush Connection Exposed Parts Chrome Plated High Copper, Low Zinc Brass Castings for Dezincification Resistance Non-Hold-Open Handle and No External Volume Adjustment to Ensure Water Conservation Low Consumption flush accuracy controlled by Para-Flo Technology Handle Packing, Stop Seat and Vacuum Breaker molded from PERMEX Rubber Compound for Chloramine Resistance